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i1Pro Calibration Setting "RGB LED" green cast

 
Author lee11lee
User - Mono 
#1 | Posted: 5 Feb 2013 10:54 
Hi,

I've calibrated the HP Dreamcolor today via a X-Rite i1Pro probe.
I selected "LCD" in Display Settings and "RGB-LED" in Calibration Settings.

After the Lut creation I saw a visible green cast over the entire image, I checked it what the reader says with the LUT applied but it
didn't see the green cast. But after I changed the Calibration Settings from "RGB-LED" to Generic CMF it saw the green cast too.

Then I tried all the different Calibration settings White-LED, Wide Gamut CCFL, CCFL...
All had slightly different results when I checked the white point and middle grey...

Now my question, what is the correct one to use?? (

Clearly RGB-LED is not the right one, but it should!

Thank you
regards

Lee Niederkofler

Author Steve

Mod - Scene 
#2 | Posted: 5 Feb 2013 11:21 
Hi Lee,

I think you must have used an i1 Display Pro, not an i1 Pro - different probes.

The X-Rite pre-sets are generic, and not necessarily accurate for all displays, although I have found them very good normally.
The Dreamcolor can be a problems though - not the best display out there.

The only way to really have the correct setting would be to use a spectro to re-calibrate the i1 Display Pro to that specific Dreamcolor.
So use an i1 Pro spectro to generate a probe calibration off-set for example.

Hope this helps.

Steve
Steve Shaw
Mob Boss at Light Illusion

Author lee11lee
User - Mono 
#3 | Posted: 5 Feb 2013 11:54 
Hi Steve,

thank you for your quick reply!
Yes you're right, I have the i1 Display Pro.

Then I would need the i1 Pro all the time with other displays too to make an offset?
Because there will be the same problem with other displays...

Therefore the i1Display Pro shouldn't be used at all if you don't have a spectrophotometer?

best regards

lee

Author Steve

Mod - Scene 
#4 | Posted: 6 Feb 2013 19:04 | Edited by: Steve 
Hi Lee,

It's a specific issue with Sony Oleds..

Sony actually suggest a manual offset value that you can use.

Ask your supplier for the value.
(I don't have it to hand).

Steve
Steve Shaw
Mob Boss at Light Illusion

Author Steve

Mod - Scene 
#5 | Posted: 6 Feb 2013 19:29 | Edited by: Steve 
I found the Sony Data - but no mention of the i1D3:

Caution of color matching between different display devices –
Colors may appear different between display devices such as CRT, LCD and OLED, even when the probe is showing the same x y value. The cause of this is considered to be related to the difference in the light source spectrum of each display device. Color matching between different display devices is known to be obtained by adjusting the target display device with offset values added to the xy chromaticity. The typical offset values *1 are described below.

When BVM (CRT) is used as the reference:

Device to be measured
Probe to be used BVM-E/F (OLED) BVM-L (LCD)
i1Pro (xref 0.004, yref 0.013) (xref, yref 0.004)
CA310 (xref 0.004, yref 0.013) (xref , yref 0.004)
CA210 (xref 0.004, yref 0.013) (xref, yref 0.005)
CS200 (xref 0.004, yref 0.013) (xref, yref 0.004)
PM5639/06 (xref 0.001, yref 0.013) (xref , yref 0.004)

When BVM-L (LCD) is used as the reference:

Device to be measured
Probe to be used BVM (CRT) BVM-E/F (OLED)
i1Pro (xref, yref 0.004) (xref 0.004, yref 0.009)
CA310 (xref , yref 0.004) (xref 0.004, yref 0.009)
CA210 (xref, yref 0.005) (xref 0.004, yref 0.018)
CS200 (xref, yref 0.004) (xref 0.004, yref 0.009)
PM5639/06 (xref , yref 0.004) (xref 0.001 yref 0.009)

The perception of color may still vary depending on the type and individual difference of the probe, or the individual difference of the observer's eyes. The values described above are typical values. Refer to "BVM (CRT)" in the case of LCD with CCFL backlight.
CH00(Konica Minolta's calibration standard), D65, and Univ. Sync
CH00(Konica Minolta's calibration standard), Univ. Sync

But, none of this works!
See: http://www.lightillusion.com/perceptual_colour_match.html
The info within the above page really is the best way to calibrate OLEDs.

Steve
Steve Shaw
Mob Boss at Light Illusion

Display Calibration Light Illusion Forums / Display Calibration /
 i1Pro Calibration Setting "RGB LED" green cast

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